Preparation and piezoelectric properties of thermoplastic polyurethane elastomer/methylamine lead iodine composite film

Methylamine lead iodine was synthesized by low-temperature liquid phase method, and thermoplastic polyurethane elastomer/methylamine lead iodine composite films were prepared by tap casting method. The microstructure, mechanical properties, dielectric properties, ferroelectric pro-perties and piezoelectric properties of the composite films were investigated. The properties of nanoge-nerator based on the composite films were studied. The results showed that compared with pure thermoplastic polyurethane elastomer, the dielectric constant, residual polarization and piezoelectric properties of the thermoplastic polyurethane elastomer/methylamine lead iodine composite films were improved to various degrees. The piezoelectric coefficient could reach 38 pC/N, which had exceeded the current commercial polyvinylidene fluoride piezoelectric film. The output voltage and current of the piezoelectric nanogenerator based on the thermoplastic polyurethane elastomer/methylamine lead iodine composite films reached 7.5 V and 100 nA, respectively, which could be applied to human energy collection and intelligent wearable sensors.